How To Fix CNV_DMC_MC_EXCEPTION207 - Incorrect target cardinality value for source structure &1; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 207

• Message text: Incorrect target cardinality value for source structure &1; see long text

What causes this issue?

Consider the situation where you map a source structure to a target
structure, and specify the access type ?Split? for the source structure.
If the target structure has a parent node, then the value of the Target
Cardinality field must be the same as the value of the parent node.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

If you want to use the access type ?Split? for source structure &V1&,
you need to change the value of the Target Cardinality field to &V2&.

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION207 - Incorrect target cardinality value for source structure &1; see long text ?

  The SAP error message CNV_DMC_MC_EXCEPTION207 indicates that there is an issue with the target cardinality value for a source structure during a data migration or conversion process. This error typically arises in the context of using the SAP Data Migration Cockpit (DMC) or during the execution of a migration project.
  Cause:
  The error is caused by a mismatch between the expected cardinality of the target structure and the actual cardinality of the source structure. Cardinality refers to the number of instances of one entity that can or must be associated with each instance of another entity. For example, if the target structure expects a one-to-many relationship but the source structure provides a one-to-one relationship, this discrepancy can trigger the error.
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Source Structure: Review the source structure to understand its cardinality. Ensure that the data being migrated matches the expected format and cardinality.
  
  
  Review Target Structure: Examine the target structure's definition to confirm what cardinality it expects. This can usually be found in the data model or migration template.
  
  
  Adjust Data Mapping: If there is a mismatch, you may need to adjust the data mapping in your migration project. This could involve:
  
  Modifying the source data to fit the expected cardinality.
  Changing the target structure to accommodate the source data if feasible.
  
  
  
  Consult Long Text: The error message suggests checking the long text for more details. This long text may provide specific guidance or additional context about the error.
  
  
  Test Migration: After making adjustments, perform a test migration to ensure that the changes resolve the issue.
  
  
  Documentation and Support: If the problem persists, consult SAP documentation or reach out to SAP support for further assistance. They may provide insights based on the specific version of SAP you are using.
  
  
  Related Information:
  
  SAP Data Migration Cockpit (DMC): This tool is used for data migration in SAP S/4HANA projects. Understanding its functionalities and limitations can help in troubleshooting issues.
  Cardinality in Data Modeling: Familiarize yourself with concepts of cardinality in data modeling, as this knowledge can help in designing data structures that align with migration requirements.
  SAP Notes and Knowledge Base Articles: Check for any relevant SAP Notes or KBA that might address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the root cause of the CNV_DMC_MC_EXCEPTION207 error and implement a suitable solution.